Punching-machine.



G. H. RICHARDSON;-

PUNCHING MACHINE.

APPLICATION mu) MAY a. mere.

L%U@,WW% Patented Dec. 12, 1916.

WITNESSES:

' xiTTORA/EV In: noun-l nun tmrno m unm. wasumhum n z FTF l M GEORGE H. RICHARDSON, OF BRIDGEPORT, CONNECTICUT.

PUNCHING-MACHINE.

b all whom it may concern:

Be it known that I, GEORGE H. RICHARD- SON, a citizen of the United States, residing at Bridgeport, county of Fairfiel d, State of Connecticut, have invented an Improvement in Punching-Machines, of which the following is a specification.

This invention has for its object to provide a simple and inexpensive punching machine adapted for general use in factories and by dealers, and especially adapted for use upon belts, that Will punch holes at any required distance apart, with perfect accuracy and with great rapidity.

With these and other objects in view, I have devised the novel punching machine, of which the following description in connection with the accompanying drawing is a specification, reference characters being used to indicate the several parts.

Figures 1, 2 and 3 are respectively end, front and rear elevations of my novel machine; Fig. 4: a section on an enlarged scale on the line 4lin Fig. 1, looking in the direction of the arrows; Fig. 5 an enlarged detail sectional view on the line 5 5 in Fig. 3, looking in the directionof the arrows, and Fig. 6 is an elevation corresponding with Fig. 3, the pawls being changed to produce reverse feed,

10 denotes the frame which may be of any ordinary or preferred construction and is adapted to rest upon a bench or table. The operative parts are all upon a carriage 1.1 which is adapted to reciprocate upon a way 12.

13 denotes a standard extending upward from the carriage, and 14 a bracket formed ingegral with or rigidly secured to the stand- 211 15 denotes the punch which is carried by a holder 16 adapted to reciprocate in a guide 17 extending from the standard. Cooperating with the punch is a strip 18 of hard wood which is recessed into a table 19, forming a portion of the frame. The belt or other piece of work being operated upon, indicated by 20 (see dotted lines, Fig. 1) is pushed forward against a stop 21 which is secured to the bed. The punchings are pushed upward and out through a hole 22 in the punch holder. The holder and punch are reciprocated by means of a cam 23 on a shaft 24 which is journaled in the standard and bracket. The cam is secured to the shaft eccentrically and is shown as having a dove- Specification of Letters Patent.

Application filed May 5, 1916.

Patented net; is, rare.

Serial No. 95,526.

tail engagement with the punch block. The special details of construction, however, are unimportant so far as the principle of the invention is concerned.

Shaft 24 carries a gear wheel 25 and is driven by means of a pinion 26 (meshing with the gear wheel) on a short shaft 27 journaled in the bracket and carrying a crank 28. The feed is effected as follows: 29 denotes a crank arm secured to the rear end of shaft 24 to which a link 30 is adjustably connected. I have shown the, crank arm as provided with an undercut slot 31 in which a nut 32 is adapted to slide. A stud bolt 33 upon which one end of the link is pivoted passes into the slot, engages the nut and adjustably locks the stud bolt to the crank arm.

The carriage is provided with an opening 34: within whichis a rack 35 secured to the top of the way on which the carriage slides. This rack is engaged by a pinion 36 (also lying within, the opening) carried by a short shaft 37 journaled in the carriage. This shaft carries a ratchet 38 which is adapted to be engaged by either of two pawls indi cated by 39 andAO pivoted to the ends of a two-armed lever 41 which is adapted to oscillateon short shaft 37 The end of the lever carrying pawl 39 is pivoted concentrically with the pawl to the other end of the link (see Fig- 6). When pawl 40 is thrown out of engagement with the ratchet, and pawl 39 is in engagement therewith, as in Fig. 3, a right feed is produced, and when pawl 39 is thrown out of engagement with the ratchet and pawl 40 into engagement therewith, as in Fig. 6, a left feed is produced. The spacing of holes in the work is effected by adjustment of link 30 on crank arm 29. By adjusting the link inward on the arm, the holes are of course made closer together, and by adjusting the link outward on the arm, they are spaced farther apart.

42 denotes a stripper which is adjustably secured to guide 17 as by a set screw 43 passing through a slot in the stripper, and acts to prevent the work from adhering to the punch and being raised thereby.

44 denotes a bearing on the top of the carriage on which the table rests lightly. This bearing serves to steady the carriage and prevent tilting, thus removing strain from the way.

The operation will be obvious from the description and drawing.

The Work is laid upon the table and held against'stop 21. Having adjusted the paWls to produce right or left feed as required, and the link upon the crank arm to produce the required spacing of holes, the operator simply" turns the crank, which causes the carriage, standard, and all of the operative parts to move in the direction required, the

reciprocation of the punch making holes in the Work, spaced apart in accordance With the adjustment of the link on the crank arm.

Having thus described my invention I claim:

-1. In a punching machine, in combination, a frame having a Way with a rack thereon, a carriage on the Way, a short shaft carrying a pinion engaging the rack and a ratchet, a two-armed lever pivoted on the shaft, right and left paWls carried by said lever and adapted to engage the ratchet, punching mechanism and means for oscillating the lever.

2. In a punching machine, in combination, a frame having a Way With a rack thereon, a carriage on the Way, a short shaft carrying a pinion engaging the rack and a ratchet, a two-armed lever pivoted on the shaft, right and left paWls carried by said lever and adapted to engage the ratchet, a punch holder, a shaft carrying a cam for actuating the punch holder and a crank arm, and a link connected to the two-armed lever and adjustably connected to the crank arm.

3. In a punching machine, in combination, a frame having a Way with a rack thereon, a carriage reciprocating on the Way, and a punch, a shaft carrying a cam v for reciprocating the punch and a crank arm,

Copies of this patent may be obtained for a short shaft carrying a pinion engaging the rack and a ratchet, a two-armed lever pivoted on the short shaft, right and left paWls on said lever adapted to engage the ratchet, and a link connecting said lever and the crank arm, all upon the carriage.

4. In a punching machine, in combination, a frame, a reciprocating carriage, a standard extending upward from the carriage and having a bracket, a shaft journaled in the standard and the bracket and carrying a cam and a crank arm, a punch holder actuated by the cam, a pinion and rack feed for the carriage, a short shaft for the pinion, a ratchet carried by the shaft, a two-armed lever pivoted on the shaft, right and left pawls adapted to engage the ratchet, and a link connecting the lever and the crank arm.

5. In a punching machine, in combination, a frame having a table, a strip of hard Wood recessed into the table, and a \va having a rack, a carriage, a standard tending upward from the carriage and having a bracket, a shaft journaled in the stand ard and the bracket, and carrying a cam and a crank arm, a punch cooperating with the strip of hard Wood and actuated by the cam, a short shaft carrying a pinion engaging the rack and a ratchet, a two-armed lever pivoted on the shaft, right and left paWls pivoted to said lever and adapted to engage the ratchet, and a link pivoted to one arm of the lever and adjustably connected to the crank arm.

In testimony whereof I afiix my signature.

GEORGE I-I. RICHARDSON.

five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

